Found this great site dedicated to the Targa Florio. The collection of photos is the best I have ever found.
Main site: http://www.targapedia.com/
1966 Photo Album: http://www.targapedia.com/album_targa_florio/1948_1968/1966/
1967 Photo Album: http://www.targapedia.com/album_targa_florio/1948_1968/1967/
1968 Photo Album: http://www.targapedia.com/album_targa_florio/1948_1968/1968/
1969 Photo Album: http://www.targapedia.com/album_targa_florio/1969_1977/1969/